Bendigo Spirit wrapped up their first WNBL championship with a comfortable 71-57 home-court victory over Townsville Fire on Sunday afternoon.

Kayla Standish's bucket at 1:37 in the opening quarter gave Townsville first and last lead of the contest as the Spirit took a seven-point advantage at the first break.

The Fire narrowed that down to five points at 32-27 by the half, and cut the Bendigo lead to a one-possession game early in the third period before the Spirit hit back hard.

Chelsea Aubry (11 points, five rebounds) made sure momentum was Bendigo's going into the final quarter as she drained a huge corner three at the buzzer to put the hosts up 52-41 in front of a screaming crowd.

Townsville managed to get some stops early in the fourth but the Spirit showed why they were clear at the top of the ladder after the regular season, holding on for a famous victory.

Kelsey Griffin posted a grand final double-double of 20 points and 11 rebounds, scoring the first seven Bendigo points in the final period in a gutsy performance.

American import Griffin told ABC TV Sport that it was the perfect way to potentially send off stalwart guard Harrower, who has been coy on whether she will play on.

"I'm speechless right now," she said.

"To be able to send out Kristi this way it means the world to me.

"The fans are the greatest, they've got behind us and we're glad to bring it home."

Griffin was assisted on the scoreboard and the glass by Gabrielle Richards (20 points, eight rebounds) while league veteran Harrower added 11 points, five assists and five boards.

The Fire were hurt by their woeful field goal percentage, making just 35 per cent of their shots from the floor, although the Spirit's accuracy (41 per cent) was not much sharper.

Townsville's body language said it all with two minutes remaining as the deficit blew out to a 14, and when the Fire called a time-out the Bendigo faithful knew it was all but over.

The Fire's two Jessicas - Adair and Foley - finished with 11 points apiece, the former adding 10 rebounds for a double-double in the losing effort.

It caps off a dominant season for the Spirit which started with eight straight wins and only three losses throughout the entire campaign.